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Chapter 8 Crossword Challenge

Horizontales
the presence of only one allele for a characteristic, as in X-linkage; hemizygosity makes descriptions of dominance and recessiveness irrelevant
n a heterozygote, expression of two contrasting alleles such that the individual displays an intermediate phenotype
a variation in an inherited characteristic
the result of a cross between two true-breeding parents that express different traits for two characteristics
a cross between a dominant expressing individual with an unknown genotype and a homozygous recessive individual; the offspring phenotypes indicate whether the unknown parent is heterozygous or homozygous for the dominant trait
a variation in a characteristic in which individuals show two, or a few, traits with large differences between them
the observable traits expressed by an organism
describes a trait whose expression is masked by another trait when the alleles for both traits are present in an individual
the first filial generation in a cross; the offspring of the parental generation
describes a trait that masks the expression of another trait when both versions of the gene are present in an individual
in a heterozygote, complete and simultaneous expression of both alleles for the same characteristic
the most commonly occurring genotype or phenotype for a given characteristic found in a population
the result of a cross between two true-breeding parents that express different traits for only one characteristic
Verticales
a visual representation of a cross between two individuals in which the gametes of each individual are denoted along the top and side of a grid, respectively, and the possible zygotic genotypes are recombined at each box in the grid
an interaction between genes such that one gene masks or interferes with the expression of another
the underlying genetic makeup, consisting of both physically visible and non-expressed alleles, of an organism
a phenomenon in which alleles that are located in close proximity to each other on the same chromosome are more likely to be inherited together
variation in a characteristic in which individuals show a range of traits with small differences between them
having two different alleles for a given gene on the homologous chromosomes
paired unit factors (i.e., genes) segregate equally into gametes such that offspring have an equal likelihood of inheriting any combination of factors
in a heterozygote, one trait will conceal the presence of another trait for the same characteristic
a species or biological system used to study a specific biological phenomenon to gain understanding that will be applied to other species
the process of mating two individuals that differ, with the goal of achieving a certain characteristic in their offspring
one of two or more variants of a gene that determines a particular trait for a characteristic
a gene present on the X chromosome, but not the Y chromosome